Creature — Dragon 6/6, 5RR (7)
Mythic Rare
Flying
Whenever Balefire Dragon deals combat damage to a player, it deals that much damage to each creature that player controls.
If it comes for you, die boldly or die swiftly—for die you will.
Illus. Eric Deschamps

9/22/2011: The damage dealt by Balefire Dragon's triggered ability isn't combat damage.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern